The NHL has made several attempts over the years to ban fighting from the sport so that players may retire with fewer head and CTE damage. In the 2018 season, the NHL came close to implementing a rule that would have punished players who chose to take off their helmets with a 10-minute game misconduct and a ban from that game.
The old school hockey fans yelled smash that, let's fight! Fighting is a pleasure that fans should appreciate, whether they do it at home or in person. It is a fundamental part of the game.